diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 6b8dac02364f..09d4f0d879a7 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -117,6 +117,8 @@ void *ring_buffer_event_data(struct ring_buffer_event *event)
 struct buffer_page {
 	u64		 time_stamp;	/* page time stamp */
 	unsigned	 size;		/* size of page data */
+	unsigned	 write;		/* index for next write */
+	unsigned	 read;		/* index for next read */
 	struct list_head list;		/* list of free pages */
 	void *page;			/* Actual data page */
 };
@@ -153,11 +155,8 @@ struct ring_buffer_per_cpu {
 	spinlock_t			lock;
 	struct lock_class_key		lock_key;
 	struct list_head		pages;
-	unsigned long			head;	/* read from head */
-	unsigned long			tail;	/* write to tail */
-	unsigned long			reader;
-	struct buffer_page		*head_page;
-	struct buffer_page		*tail_page;
+	struct buffer_page		*head_page;	/* read from head */
+	struct buffer_page		*tail_page;	/* write to tail */
 	struct buffer_page		*reader_page;
 	unsigned long			overrun;
 	unsigned long			entries;
@@ -566,10 +565,11 @@ int ring_buffer_resize(struct ring_buffer *buffer, unsigned long size)
 
 static inline int rb_per_cpu_empty(struct ring_buffer_per_cpu *cpu_buffer)
 {
-	return (cpu_buffer->reader == cpu_buffer->reader_page->size &&
+	return cpu_buffer->reader_page->read == cpu_buffer->reader_page->size &&
 		(cpu_buffer->tail_page == cpu_buffer->reader_page ||
 		 (cpu_buffer->tail_page == cpu_buffer->head_page &&
-		  cpu_buffer->head == cpu_buffer->tail)));
+		  cpu_buffer->head_page->read ==
+		  cpu_buffer->tail_page->write));
 }
 
 static inline int rb_null_event(struct ring_buffer_event *event)
@@ -577,7 +577,7 @@ static inline int rb_null_event(struct ring_buffer_event *event)
 	return event->type == RINGBUF_TYPE_PADDING;
 }
 
-static inline void *rb_page_index(struct buffer_page *page, unsigned index)
+static inline void *__rb_page_index(struct buffer_page *page, unsigned index)
 {
 	return page->page + index;
 }
@@ -585,15 +585,21 @@ static inline void *rb_page_index(struct buffer_page *page, unsigned index)
 static inline struct ring_buffer_event *
 rb_reader_event(struct ring_buffer_per_cpu *cpu_buffer)
 {
-	return rb_page_index(cpu_buffer->reader_page,
-			     cpu_buffer->reader);
+	return __rb_page_index(cpu_buffer->reader_page,
+			       cpu_buffer->reader_page->read);
+}
+
+static inline struct ring_buffer_event *
+rb_head_event(struct ring_buffer_per_cpu *cpu_buffer)
+{
+	return __rb_page_index(cpu_buffer->head_page,
+			       cpu_buffer->head_page->read);
 }
 
 static inline struct ring_buffer_event *
 rb_iter_head_event(struct ring_buffer_iter *iter)
 {
-	return rb_page_index(iter->head_page,
-			     iter->head);
+	return __rb_page_index(iter->head_page, iter->head);
 }
 
 /*
@@ -610,7 +616,7 @@ static void rb_update_overflow(struct ring_buffer_per_cpu *cpu_buffer)
 	for (head = 0; head < rb_head_size(cpu_buffer);
 	     head += rb_event_length(event)) {
 
-		event = rb_page_index(cpu_buffer->head_page, head);
+		event = __rb_page_index(cpu_buffer->head_page, head);
 		BUG_ON(rb_null_event(event));
 		/* Only count data entries */
 		if (event->type != RINGBUF_TYPE_DATA)
@@ -640,13 +646,13 @@ rb_add_stamp(struct ring_buffer_per_cpu *cpu_buffer, u64 *ts)
 
 static void rb_reset_head_page(struct ring_buffer_per_cpu *cpu_buffer)
 {
-	cpu_buffer->head = 0;
+	cpu_buffer->head_page->read = 0;
 }
 
 static void rb_reset_reader_page(struct ring_buffer_per_cpu *cpu_buffer)
 {
 	cpu_buffer->read_stamp = cpu_buffer->reader_page->time_stamp;
-	cpu_buffer->reader = 0;
+	cpu_buffer->reader_page->read = 0;
 }
 
 static inline void rb_inc_iter(struct ring_buffer_iter *iter)
@@ -743,9 +749,8 @@ __rb_reserve_next(struct ring_buffer_per_cpu *cpu_buffer,
 	struct ring_buffer *buffer = cpu_buffer->buffer;
 	struct ring_buffer_event *event;
 
-	/* No locking needed for tail page */
 	tail_page = cpu_buffer->tail_page;
-	tail = cpu_buffer->tail;
+	tail = cpu_buffer->tail_page->write;
 
 	if (tail + length > BUF_PAGE_SIZE) {
 		struct buffer_page *next_page = tail_page;
@@ -774,7 +779,7 @@ __rb_reserve_next(struct ring_buffer_per_cpu *cpu_buffer,
 		}
 
 		if (tail != BUF_PAGE_SIZE) {
-			event = rb_page_index(tail_page, tail);
+			event = __rb_page_index(tail_page, tail);
 			/* page padding */
 			event->type = RINGBUF_TYPE_PADDING;
 		}
@@ -784,14 +789,14 @@ __rb_reserve_next(struct ring_buffer_per_cpu *cpu_buffer,
 		tail_page->size = 0;
 		tail = 0;
 		cpu_buffer->tail_page = tail_page;
-		cpu_buffer->tail = tail;
+		cpu_buffer->tail_page->write = tail;
 		rb_add_stamp(cpu_buffer, ts);
 		spin_unlock(&cpu_buffer->lock);
 	}
 
 	BUG_ON(tail + length > BUF_PAGE_SIZE);
 
-	event = rb_page_index(tail_page, tail);
+	event = __rb_page_index(tail_page, tail);
 	rb_update_event(event, type, length);
 
 	return event;
@@ -823,12 +828,12 @@ rb_add_time_stamp(struct ring_buffer_per_cpu *cpu_buffer,
 		return -1;
 
 	/* check to see if we went to the next page */
-	if (cpu_buffer->tail) {
+	if (cpu_buffer->tail_page->write) {
 		/* Still on same page, update timestamp */
 		event->time_delta = *delta & TS_MASK;
 		event->array[0] = *delta >> TS_SHIFT;
 		/* commit the time event */
-		cpu_buffer->tail +=
+		cpu_buffer->tail_page->write +=
 			rb_event_length(event);
 		cpu_buffer->write_stamp = *ts;
 		*delta = 0;
@@ -846,7 +851,7 @@ rb_reserve_next_event(struct ring_buffer_per_cpu *cpu_buffer,
 
 	ts = ring_buffer_time_stamp(cpu_buffer->cpu);
 
-	if (cpu_buffer->tail) {
+	if (cpu_buffer->tail_page->write) {
 		delta = ts - cpu_buffer->write_stamp;
 
 		if (test_time_stamp(delta)) {
@@ -868,7 +873,7 @@ rb_reserve_next_event(struct ring_buffer_per_cpu *cpu_buffer,
 		return NULL;
 
 	/* If the reserve went to the next page, our delta is zero */
-	if (!cpu_buffer->tail)
+	if (!cpu_buffer->tail_page->write)
 		delta = 0;
 
 	event->time_delta = delta;
@@ -933,8 +938,8 @@ ring_buffer_lock_reserve(struct ring_buffer *buffer,
 static void rb_commit(struct ring_buffer_per_cpu *cpu_buffer,
 		      struct ring_buffer_event *event)
 {
-	cpu_buffer->tail += rb_event_length(event);
-	cpu_buffer->tail_page->size = cpu_buffer->tail;
+	cpu_buffer->tail_page->write += rb_event_length(event);
+	cpu_buffer->tail_page->size = cpu_buffer->tail_page->write;
 	cpu_buffer->write_stamp += event->time_delta;
 	cpu_buffer->entries++;
 }
@@ -1178,10 +1183,10 @@ void ring_buffer_iter_reset(struct ring_buffer_iter *iter)
 	/* Iterator usage is expected to have record disabled */
 	if (list_empty(&cpu_buffer->reader_page->list)) {
 		iter->head_page = cpu_buffer->head_page;
-		iter->head = cpu_buffer->head;
+		iter->head = cpu_buffer->head_page->read;
 	} else {
 		iter->head_page = cpu_buffer->reader_page;
-		iter->head = cpu_buffer->reader;
+		iter->head = cpu_buffer->reader_page->read;
 	}
 	if (iter->head)
 		iter->read_stamp = cpu_buffer->read_stamp;
@@ -1200,7 +1205,7 @@ int ring_buffer_iter_empty(struct ring_buffer_iter *iter)
 	cpu_buffer = iter->cpu_buffer;
 
 	return iter->head_page == cpu_buffer->tail_page &&
-		iter->head == cpu_buffer->tail;
+		iter->head == cpu_buffer->tail_page->write;
 }
 
 static void
@@ -1277,11 +1282,11 @@ rb_get_reader_page(struct ring_buffer_per_cpu *cpu_buffer)
 	reader = cpu_buffer->reader_page;
 
 	/* If there's more to read, return this page */
-	if (cpu_buffer->reader < reader->size)
+	if (cpu_buffer->reader_page->read < reader->size)
 		goto out;
 
 	/* Never should we have an index greater than the size */
-	WARN_ON(cpu_buffer->reader > reader->size);
+	WARN_ON(cpu_buffer->reader_page->read > reader->size);
 
 	/* check if we caught up to the tail */
 	reader = NULL;
@@ -1342,7 +1347,7 @@ static void rb_advance_reader(struct ring_buffer_per_cpu *cpu_buffer)
 	rb_update_read_stamp(cpu_buffer, event);
 
 	length = rb_event_length(event);
-	cpu_buffer->reader += length;
+	cpu_buffer->reader_page->read += length;
 }
 
 static void rb_advance_iter(struct ring_buffer_iter *iter)
@@ -1373,7 +1378,7 @@ static void rb_advance_iter(struct ring_buffer_iter *iter)
 	 * at the tail of the buffer.
 	 */
 	BUG_ON((iter->head_page == cpu_buffer->tail_page) &&
-	       (iter->head + length > cpu_buffer->tail));
+	       (iter->head + length > cpu_buffer->tail_page->write));
 
 	rb_update_iter_read_stamp(iter, event);
 
@@ -1623,7 +1628,9 @@ rb_reset_cpu(struct ring_buffer_per_cpu *cpu_buffer)
 	INIT_LIST_HEAD(&cpu_buffer->reader_page->list);
 	cpu_buffer->reader_page->size = 0;
 
-	cpu_buffer->head = cpu_buffer->tail = cpu_buffer->reader = 0;
+	cpu_buffer->head_page->read = 0;
+	cpu_buffer->tail_page->write = 0;
+	cpu_buffer->reader_page->read = 0;
 
 	cpu_buffer->overrun = 0;
 	cpu_buffer->entries = 0;